Metallic packing.



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v INNER/0F Patented Jan. 3, 1911.

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CHARLES O. BULOCK, OF CLEVELAND, OHIO, ASSIGNOR TO THE H. W.JOHNS-MANVILLE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NEW YORK.

METALLIC PACKING.

Specification of Letters Patent.

Patented Jan. 3, 1911.

Application filed May 25, 1910. Serial No. 563,243.

To all whom ti may concern:

Be it known that 1, CHARLES O. BULooK, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Metallic Packings, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

This invention relates to metallic packing for use on piston rods, valvestems and various other devices where such packing can be successfullyemployed; and it has for its object the improvement of such packingwhereby the same will prevent more effectually the leakage of steam orother fluid under pressure, and which will bear with an even pressureabout the rod or shaft passing through the same, whereby the wear of thepacking and of the rod or shaft will be uniform.

Structures effecting the above stated object are shown in the drawingsaccompanying this application, in which- Figure l is a view takenlongitudinally through the stufling box and showing what I term theinside type of my invention, certain of the parts being shown in sectionand other of the parts in elevation; Fig. 2 is a transverse sectiontaken on the line 22 of Fig. 1, the stuffing box being omitted; Fig. 3is a sectional view taken through the outer casing of the packing andshowing a packing-ring therein, parts of the latter being broken awayfor clearness of illustration; Fig. 4: is a view similar to Fig. 3,except that the parts broken away in the latter figure are shown infull, and the positions of the joints in the adjacent rings are shown indotted lines; Fig. 5 is a view, partly in section and partly inelevation, of another embodiment of my invention which 1 term theoutside type said view showing the stufling boxwith the metallic packingsecured to said box; and Fig. 6 is an end view of the invention shown inFig. 5, the rod or shaft appearing in section.

First taking up a description of the inside type of my invention, thesame being shown in Figs. 1 to 41. inclusive, 1 represents the head ofthe cylinder containing the steam or other fluid under pressure; 2represents the rod or shaft passing through the said head; 3 representsthe stuffing box attached to the said head and surrounding the rod orshaft, a space being maintained about the latter for the packing, and 4is the packing gland, the same being secured to the stufling box by thestud-screws 5, or by any other suitable means. The parts thus referredto are well known in the art and, except as they enter into combinationwith he metallic packing, constitute no part of my invention and neednot be more specifically described.

' Within the stuffing box 8, and surrounding the rod or shaft 2, is thecasing 6 of the packing, said casing being made of gray iron or of anyother suitable material, and forming a shell that fits within thestuffing box, the shell having inwardly projecting end flanges 7, one ofthe same appearing in Fig. 1. Intermediate said end flanges, the casingis provided with inwardly extending flanges 8, so that circumferentialchannels are formed on the interior of the casing, the flanges 7 and 8being spaced slightly from the rod or shaft to provide for anyirregularities in the latter. The casing 6 is formed in halves, saidhalves being secured together in any suitable manner, as by thefillister-head screws 9, the heads of the same resting in countersinksin one of the halves of the casing so that they will not interfere withthe insertion of the latter into the stuffing box. For holding thehalves of the easing 1n radial alinement, the same are bored at theirends to receive dowel pins 10, said pins resting partly in one half ofthe casing and partly in the other half. For holding the said halves inlongitudinal alinement, similar dowel pins 11 are inserted in radialbores between the halves, as shown in Figs. 1 and 2. By these means, thehalves of the casing are maintained in their proper relative positions.For preventing the leakage of the steam or other fluid to the stuffingbox outside the casing, a ring 12 of lead, or other suitable substance,is interposed between the cylinder head and the end of the casing 6,said ring being compressed between these parts when the gland 4: isapplied.

Within the channels between the flanges 7 and 8 of the casing, I placethe packing rings, the same being preferably used in pairs,as shown inFig. 1.' Any number of movement, and said .an angle with such pairs maybe employed as are necessary to overcome all leakage. These packingrings are made of any suitable metal and are of compound construction,the same consisting of the outer ring sections 18 and of the inner ringsections 14, the outer sections being channel-shaped in cross-section toreceive the inner sections within the channels thereof. The interiorsections 13 and'l4 bear 2 and Th edges of all of said upon the rod orshaft form a fluid-tight joint therewith. e channels inthe casing 6 areof sufii- ,cient Width to receive a pair of the com- 15 pound packingrings side by side, the rings being sufficiently loose to permit them tomove radially in case any irregularities in the rod or shaft shouldnecessitate such channels are made of suflicient depth to accommodatesuch radial movement and to also provide space for the springs 15 thatsurround the ring sections 13 and press all of the sections toward therod or shaft. As appears from Figs. 8 and 4, there are three of thesesections 13 in each of the rings, although any other suitable number ofsuch sections may be employed. The joints 16 between these sections areat respect to the radius of the mug as shown, the angle being such as topermit the rings to settle inwardly to take up all wear.

The sections 14 of the inner ring correspend in number to the sections13, and the joints 17 between the inner sections are broken with respectto the joints 16, so that each compound ring has a hearing at all pointsabout the rod or shaft. As is shown in Fig. 3, the joints 1? are ofsuflicient width to permit dowel pins 18 to extend therethrough fromside to side of the outer ring sections 13, said dowel pins preventingthe inner sections from creeping about the rod or shaft, which movement,if permit-ted, might result in bringing the joints 17 into line with thejoints 16 and in thus forming a leak through the compound ring. It willbe understood from Fig. 3 that the inner beveled ends of the sections 13are supported upon the inner sections 14 and are thus prevented frombearing with undue pressure against the rod or shaft; for thecompressing springs 15 tend to cam these ends of the sections 13inwardly and the opposite ends of the sections outwardly, so that thesesections would, in the absence of the inner sections, bear with unequalpressures at their opposite ends. This unequal pressure would result inunequally wearing and grooving the rod or shaft, especially if it bereciprocated. The inner ring sections 14, however, hold the outer ringsections outwardly and thus prevent this inequality in the wear of therod or shaft. As is indicated by the full and dotted lines in Fig. 4,

' head, the rod or shaft and the the joints 16 in one ring are staggeredwill] respect to the joints in the ring that is paired therewith, andthe same staggered arrangement, of course, applies to the joints 17between the inner ring sections.

Some of the fluid under pressure will enter the first channel in thecasing 6 and reach the outsides of the first pair, of packing rings bypassing between the flange 7 and the adjacent ring. The pressure of thefluid against the face of the said adjacent ring presses the other ringwith which it is paired against the flange 8 and thus prevents anyconsiderable quantity of the fluid from passing the first pair ofpacking rings. Some fluid may pass the second pair of rings in the samemanner; but the amount of the fluid thus passing is diminished with eachpair of rings, and a sullicient number of pairs is employed toeffectually stop all leakage.

Taking up the outside type of my invention as it is shown in Figs. 5 and6, 1, 2, and 3 represent, respectively, the cylinder stufling box, whichparts may be identical with the corresponding )arts in the inside typehereinbefore described. Secured to the outer end of the stufliug box, bymeans of the elongated stud-serews 19, is a split packing-ring casing20, the same being divided diametrically and having its parts securedtogether by bolts 21. For properly alining the halves of the casing 20both radiallyand longitudinally, dowel pins 10 and 11 are employed, saidpins corresponding in position and function to the pins 10 and 11 of theother type of my invention. The casing 20 is provided with internalannular channels containing the pairs of packing rings, the same beingidentical in construction and operation with the rings hereinbefore(lescribed, so that no further description is shaft so as to provide forany irregularities 111 the movement of the latter. The member 24: ispreferably recessed at its inner end to receive short helical springs 26that press said member outwardly against the boss or shoulder 22 of thecasing 20 and thus provide a tight joint leading outwardly toward thegasket 23. The fluid under pressure, acting upon the inner end of themember 24, also presses the latter against said boss or shoulder, andthus prevents the leakage of the fluid outwardly at that point.

My invention may be applied to valverods in any form of compressed fluidengines, to the rods in fluid compressors, or to other moving parts pastwhich fluid under compression has a tendency to leak. The term rod,therefore, is employed in the claims in a generic sense, and is intendedto include all sorts of moving parts to which the packing rings may beapplied.

Having thus described my invention what I claim as new and desire tosecure by Letters-Patent is:

1. As a new article of manufacture, a compound metallic packing ring forpiston rod stufling boxes and the like consisting of a plurality ofmetallic outer ring sections that are grooved on their interior surfacesand of a plurality of inner ring sections extending into the grooves ,ofthe outer ring sections, the joints between. the outer sections breakingwith the joints between the inner sect-ions, and the inner edge of theouter ring closely embracing the rod.

2. As a new article of manufacture, a compound metallic packing ring forpiston rod stuffing boXes and the like, the same consisting of aplurality of metallic outer ring sections that are grooved on theirinterior surfaces and of a plurality of inner ring sections within thegrooves of the outer sections, the joints between the outer sectionsbreaking with the joints of the inner sec tions, and the inner edge ofthe outer ring closely embracing the rod, and means surrounding theouter sections for holding them in position.

8. As a new article of manufacture, a compound metallic packing ring,the same consisting of a plurality of outer ring sections that arechanneled on their interior surfaces, the joints between said sectionsbeing at an angle with the radius of the ring, and of a plurality ofinner ring sections within the channels of the outer sections, thejoints of the outer sections breaking with the joints of the innersections, and means for maintaining the joints in their brokenrelations.

4. As a new article of manufacture, a compound metallic packing ring,the same consisting of a plurality of outer ring sections that arechanneled on their inner surfaces and of a plurality of inner ringsections within the channels of the outer sections, the joints betweenthe outer sections breaking with. the joints between the inner sections,and pins carried by the outer sections and projecting into the channelsthereof between the adjacent ends of the inner sections, whereby thejoints are maintained in their broken relation.

5. As a new article of manufacture, a

compound metallic packing ring, the same consisting of a plurality ofouter ring sections that are channeled on their inner surfaces, the endsof the adjacent sections being in contact and each of the lines ofcontact being at an angle with respect to the corresponding radius ofthe ring, and of a plurality of inner ring sections within the channelsof the outer sections, each inner section being within two adjacentouter sec tions and extending to substantially the centers of the latterwhereby the joints between the outer sections are broken with respect tothe joints of the inner sections and pins carried by the outer sectionsand extending into the channels thereof and through the joints of theinner sections.

6. As a new article of manufacture, a compound metallic packing ring,the same consisting of a plurality of outer ring sections that arechanneled on their inner surfaces, the ends of the adjacent sectionsbeing in contact and. each of the lines of contact being at an anglewith respect to the corresponding radius of the ring, and of a pluralityof inner ring sections within the channels of the outer sections, eachinner section being within two adjacent outer sections and extending tosubstantially the cen ters of the latter, whereby the joints between theouter sections are broken with respect to the oints of the innersections pins carried by the outer sections and extending into thechannels thereof and through the joints of the inner sections, and aspring surrounding the outer sections for holding them in position.

7. In a ring packing, the combination, with an annular channeled casingand the rod passing through the same, of a plu rality of outer ringsections within the channel of the casing and surrounding and contactingwith the rod, said sections being grooved on their interior surfaces,and a plurality of inner ring sections within the grooves of the outersections, the joints of the outer sections breaking with the joints ofthe inner sections.

8. In a ring packing, the combination, with a divided casing having anannular channel in its interior surface, of the rod to be packedextending through the said cas ing, means for holding the parts of thedi vided casing together, and a compound metallic packing ringsurrounding the rod within the channel of the casing, said compound ringconsisting of a plurality of outer sections that are channeled on theirinterior surfaces and of a plurality of inner ring sections within thechannels of the outer ring sections, all of' said sections hear ingagainst the rod and the joints of the outer sections breaking with thejoints of the inner sections.

9. The combination, with a channeled casing and a rod passing throughthe same, of a pair of compound metallic packing rings within thechannel of the casing and surrounding the rod, each of said ringscomprising a plurality of outer sections that are grooved on theirinterior surfaces and of a plurality of inner ring sections within thegrooves of the outer sections, the joints between the outer sectionsbreaking with the joints between the inner sections, and the joints inone ring breaking with the corresponding joints in the ring pairedtherewith.

10. The combination, with a cylinder head, of a rod extending throughsaid head, a stufling-box projecting from the head and surrounding therod, a split casing secured to the outer end of the stuiiingbox, saidcasing being grooved in its interior surface, and a compound metallicpackingring within the groove of said casing, said ring comprising aplurality of outer ring sections having their inner surfaces channeledand of a plurality of inner ring sections within the channels of theouter sections, all of said sections contacting with the rod and thejoints of the outer sections breaking with the joints of the innersections, and means surrounding the outer sections and pressing all ofthe sections into contact with the rod.

11. The combination, with a cylinder head, of a rod extending throughsaid head, a stniling-box projecting from the head and surrounding therod but spaced from the latter, a ring within the stufiing-box andsurrounding the rod, springs acting against the inner end of the saidring and forcing the same outwardly, a split metallic casing secured tothe outer end of the stufling-box and surrounding the said rod, saidcasing having a boss projecting into the stufiingbox and pressing thering therein backwardly against the tension of the said springs, and acompound packing ring within a channel on the inner surface of the saidcasing, said ring comprising a plurality of outer sections havingchannels 011 their inner surfaces and of a. plurality of inner ringsections within the channels of the outer sections, the joints betweenthe outer sections breaking with the joints of the inner sections, asand for the purpose specified.

12. The combination, with a cylinder head, of a rod passing through saidhead, a stuffing-box projecting surrounding the rod but spaced from thelat ter, a split metallic ring member within the stufling-box andsurrounding the rod, means for holding the parts of said membertogether, springs engaging the inner end of the member and tending toforce the latter outwardly, a divided casing secured to the outer. endof the stufiing-box, said casing being channeled on its interiorsurface, a boss projecting from the casing and extending into thestuffing-box agalnst the ring member therein and pressing the latterbackwardly against the said springs, and a pair of contacting compoundmetallic packing rings within the channel of the said casing, each ofsaid rings comprising a plurality of outer sections having channels ontheir inner surfaces and a plurality of inner sections within thechannels of the outer sections, the joints between the outer sections ofeach ring breaking with the joints between the inner sections thereof,and the joints of one ring breaking with the corresponding joints of thering paired therewith.

In testimony whereof, I hereunto ailix my signature in the presence oftwo witnesses.

CHARLES O. BULOCK. Witnesses J. B. HULL, BRENNAN B. VVEs'r.

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